The American, who claims 3 million people a day visit his website Infowars to listen to his radio show, appeared on screen as the Bilderberg group met at a hotel in Watford, Hertfordshire.

He insisted the Euro currency is a Berlin-inspired master plan by Nazis to conquer Europe and claimed Labour shadow chancellor Ed Balls was among a shadowy group of "puppeteers" controlling the planet, who had threatened to chop his head off.

On Bilderberg, Jones said: "It's the ultimate lobbying meeting, we have forced them from cover.

"The Euro is a Nazi German plan to take over Europe... BB [Bilderberg] is heavily involved in the EU plan and helped hatch it and it's a Nazi plan."

Neil told the tin foil hat society's loudest campaigner to "shut up" two times, prompting a furious outburst from Jones, who claimed the BBC was a part of the conspiracy to control the world.

Waggling his finger at Neil, Jones ranted: "You keep telling me to shut up, this isn't a game. You will not stop freedom. Humanity is waking up. We're in a police state. It's 1984 and you're trying to normalise it."

Neil brought the curtain down on the interview by telling Jones: "You are worst person I have ever interviewed."

Later, he claimed Jones' high-octane performance was "an act."

Government minister withot portfolio Kenneth Clarke chairs a steering group for the Bilderberg group - which is probably rich pickings for fevered minds like Alex Jones.'

Commenting on why the Bilderberg group had such a shadowy reputation, Clarke said press conferences used to be held after each conference - but no reporters turned up.

He said: "It's an informal discussion about politics and the worlds problems with a lot of politicians and businessmen and we always produce lists of whose there. It's not secret but we don't have a mass audience listening to our discussion."